English verb conjugation MUST UNDERGO

Irregular verb: undergo - underwent - undergone


Affirmation

Simple form

I must undergo
you must undergo
he must undergo
we must undergo
you must undergo
they must undergo

V-ing form

I must be undergoing
you must be undergoing
he must be undergoing
we must be undergoing
you must be undergoing
they must be undergoing

Perfect

I must have undergone
you must have undergone
he must have undergone
we must have undergone
you must have undergone
they must have undergone

V-ing perfect

I must have been undergoing
you must have been undergoing
he must have been undergoing
we must have been undergoing
you must have been undergoing
they must have been undergoing

Negation

Simple form

I must not undergo
you must not undergo
he must not undergo
we must not undergo
you must not undergo
they must not undergo

V-ing form

I must not be undergoing
you must not be undergoing
he must not be undergoing
we must not be undergoing
you must not be undergoing
they must not be undergoing

Perfect

I must not have undergone
you must not have undergone
he must not have undergone
we must not have undergone
you must not have undergone
they must not have undergone

V-ing perfect

I must not have been undergoing
you must not have been undergoing
he must not have been undergoing
we must not have been undergoing
you must not have been undergoing
they must not have been undergoing

Interrogative form

Simple form

must I undergo?
must you undergo?
must he undergo?
must we undergo?
must you undergo?
must they undergo?

V-ing form

must I be undergoing?
must you be undergoing?
must he be undergoing?
must we be undergoing?
must you be undergoing?
must they be undergoing?

Perfect

must I have undergone?
must you have undergone?
must he have undergone?
must we have undergone?
must you have undergone?
must they have undergone?

V-ing perfect

must I have been undergoing?
must you have been undergoing?
must he have been undergoing?
must we have been undergoing?
must you have been undergoing?
must they have been undergoing?

Interro-negative form

Simple form

must I not undergo?
must you not undergo?
must he not undergo?
must we not undergo?
must you not undergo?
must they not undergo?

V-ing form

must I not be undergoing?
must you not be undergoing?
must he not be undergoing?
must we not be undergoing?
must you not be undergoing?
must they not be undergoing?

Perfect

must I not have undergone?
must you not have undergone?
must he not have undergone?
must we not have undergone?
must you not have undergone?
must they not have undergone?

V-ing perfect

must I not have been undergoing?
must you not have been undergoing?
must he not have been undergoing?
must we not have been undergoing?
must you not have been undergoing?
must they not have been undergoing?